5 papers
Spatial sparse sampling-based iterative optimization framework for GNSS Direct Position Estimation
Wei Gao, Rong Yang, Jihong Huang +2
Direct position estimation (DPE), a promising technique in Global Navigation Satellite Systems (GNSS) receivers, enables estimation of position, velocity, and time (PVT) solutions…
Credible Uncertainty Quantification under Noise and System Model Mismatch
Penggao Yan, Xingqun Zhan, Rui Sun +1
State estimators often provide self-assessed uncertainty metrics, such as covariance matrices, whose credibility is critical for downstream tasks. However, these self-assessments c…
Geometrical portrait of Multipath error propagation in GNSS Direct Position Estimation
Jihong Huang, Rong Yang, Wei Gao +2
Direct Position Estimation (DPE) is a method that directly estimate position, velocity, and time (PVT) information from cross ambiguity function (CAF) of the GNSS signals, signific…
An Accelerated Camera 3DMA Framework for Efficient Urban GNSS Multipath Estimation
Shiyao Lv, Xin Zhang, Xingqun Zhan
Robust GNSS positioning in urban environments is still plagued by multipath effects, particularly due to the complex signal propagation induced by ubiquitous surfaces with varied r…
Weiss-Weinstein bound of frequency estimation error for very weak GNSS signals
Xin Zhang, Xingqun Zhan, Jihong Huang +2
Tightness remains the center quest in all modern estimation bounds. For very weak signals, this is made possible with judicial choices of prior probability distribution and bound f…